U.S. Geothermal Inc.

U.S. Geothermal Inc.

September 10, 2010 18:57 ET

U.S. Geothermal Announces Stock Option and Restricted Share Grants

BOISE, IDAHO--(Marketwire - Sept. 10, 2010) - U.S. Geothermal Inc. (TSX:GTH)(NYSE Amex:HTM), a leading renewable energy development company focused on the production and sale of electricity from geothermal energy, announced today that it has granted options pursuant to its 2009 Stock Incentive Plan to directors, employees and consultants to acquire 1,300,000 shares in capital of the company. The options are exercisable at a price of US$0.86 per share for a term of 5 years expiring September 10, 2015. The company also awarded 705,000 restricted shares to directors and employees. The options and shares will vest subject to the terms set forth in the Company's 2009 Stock Incentive Plan.

The U.S. Geothermal Inc. 2009 Stock Incentive Plan was approved by the shareholders of the company at an Annual General Meeting held December 17, 2009.

About U.S. Geothermal Inc.:

U.S. Geothermal Inc. is a leading renewable energy development company that is operating geothermal power projects at Raft River, Idaho and San Emidio, Nevada. The Neal Hot Springs project will be the company's third operating power project. The company holds geothermal energy rights to 69,500 acres comprising six advanced stage geothermal development projects. The San Emidio project is currently undergoing construction of a new 8.6 net MW binary cycle power plant.

Please visit our Website at: www.usgeothermal.com

The information provided in this news release may contain forward-looking statements within the definition of the Safe Harbor provisions of the US Private Securities Litigation Reform Act of 1995, including statements regarding the anticipated development of San Emidio, including financing, megawatt output and schedule. These statements are based on U.S. Geothermal Inc.'s current expectations and beliefs and are subject to a number of risks and uncertainties that can cause actual results to differ materially from those described, including but not limited to, completion of the definitive agreements with Enbridge, application for and approval of long-term financing from the DOE. Readers are cautioned to review the risk factors identified by the company in its filings with Canadian and US securities agencies. Forward-looking statements are based on management's expectations, beliefs and opinions on the date the statements are made. U.S. Geothermal Inc. assumes no obligation to update forward-looking statements if management's expectations, beliefs, or opinions, or other factors, should change.

The NYSE Amex and the Toronto Stock Exchange do not accept responsibility for the adequacy of this release.

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